linux-kernel - Re: [PATCH next 2/2] dt-bindings: gpio: add entry for hisilicon,gpio-ascend910

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Message-ID: <050ab042-d51c-1e9a-eb85-8fbec8020211@huawei.com>
Date:   Thu, 27 Oct 2022 15:47:48 +0800
From:   chenweilong <chenweilong@...wei.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <f.fangjian@...wei.com>, <linus.walleij@...aro.org>,
        <yangyicong@...ilicon.com>, <xuwei5@...wei.com>,
        <robh+dt@...nel.org>, <robh@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH next 2/2] dt-bindings: gpio: add entry for
 hisilicon,gpio-ascend910

On 2022/10/26 22:46, Krzysztof Kozlowski wrote:
> On 25/10/2022 23:42, Weilong Chen wrote:
>> Add the new compatible for HiSilicon gpio controller driver.
>>
>> Signed-off-by: Weilong Chen <chenweilong@...wei.com>
>> ---
>>  .../gpio/hisilicon,gpio-ascend910.yaml        | 54 +++++++++++++++++++
>>  MAINTAINERS                                   |  1 +
>>  2 files changed, 55 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/gpio/hisilicon,gpio-ascend910.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/gpio/hisilicon,gpio-ascend910.yaml b/Documentation/devicetree/bindings/gpio/hisilicon,gpio-ascend910.yaml
>> new file mode 100644
>> index 000000000000..912e4b808cae
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/gpio/hisilicon,gpio-ascend910.yaml
>> @@ -0,0 +1,54 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/gpio/hisilicon,gpio-ascend910.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: HiSilicon common GPIO controller Device Tree Bindings
> Drop "Device Tree Bindings"
>
>> +
>> +maintainers:
>> +  - Jay Fang <f.fangjian@...wei.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: hisilicon,gpio-ascend910
>> +    description:
>> +      The HiSilicon common GPIO controller can be used for many different
>> +      types of SoC such as Huawei Ascend AI series chips.
> Put this description in top-level description.
>
>> +
>> +  reg:
>> +    description:
>> +      Address and length of the register set for the device.
> Drop description.
>
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  gpio-controller: true
>> +
>> +  "#gpio-cells":
>> +    const: 2
>> +
>> +  ngpios:
>> +    minimum: 1
>> +    maximum: 32
>> +
>> +required:
>> +  - compatible
>> +  - gpio-controller
> gpio-cells are not required?
>
>> +  - reg
>> +  - interrupts
>> +  - ngpios
>> +
>> +unevaluatedProperties: false
> Instead:
> additionalProperties: false
>
>> +
>> +examples:
>> +  - |
>> +    gpio@...d0000 {
>> +      compatible = "hisilicon,gpio-ascend910";
>> +      reg = <0x840d0000 0x1000>;
>> +      ngpios = <0x20>;
> Convention for counting is to use decimal numbers.
>
>> +      gpio-controller;
>> +      #gpio-cells = <2>;
>> +      interrupts = <0x0 33 0x4>;
> This looks like standard IRQ flags, so use respective defines.

Sorry, I don't get this, you mean like this? :

interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;

Thanks.

>
> Best regards,
> Krzysztof
>
> .